Prevent the system from logging out if transactions are pending completion

Summary: BUG: 318415

Reviewers: #plasma, davidedmundson

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D13269

discover/DiscoverObject.cpp

@@ -37,6 +37,7 @@
 #include <QGuiApplication>
 #include <QSortFilterProxyModel>
 #include <QTimer>
+#include <QSessionManager>
 
 // KDE includes
 #include <KAboutApplicationDialog>
@@ -279,6 +280,13 @@ void DiscoverObject::integrateObject(QObject* object)
 
     object->installEventFilter(this);
     connect(object, &QObject::destroyed, qGuiApp, &QCoreApplication::quit);
+
+    connect(qGuiApp, &QGuiApplication::commitDataRequest, this, [this](QSessionManager &sessionManager) {
+        if (ResourcesModel::global()->isBusy()) {
+            Q_EMIT preventedClose();
+            sessionManager.cancel();
+        }
+    });
 }
 
 bool DiscoverObject::eventFilter(QObject * object, QEvent * event)